I don't quite understand why any video file would be zipped. Zipping a video file won't compress it very much if at all. Are you sure it's a video file? How large is it? I think you should see these tips: 1. Beware of files below 1 MB (1,000 KB)
WARNING: Viruses on network you should be aware of! (click on link)
2.
Movie download issues (click on link)
3. Get a reliable video player with in-built codecs; recommended is
VLC - (click on link) _ (choose nearest mirror site)
You'd need to unzip that file before you could play it. But check it over with an anti-virus program BEFORE you open it!!!